Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9178614 | Method for estimating amount of wavelength dispersion, wavelength dispersion compensation circuit, and receiving device | Etsushi Yamazaki, Takayuki Kobayashi, Riichi Kudo, Koichi Ishihara, Tadao Nakagawa +1 more | 2015-11-03 |
| 9160479 | Client signal mapping circuit and mapping method | Masahiro Suzuki, Takuya Ohara, Takashi Ono, Shigeki Aisawa | 2015-10-13 |
| 8977120 | Client signal accommodating multiplexing apparatus and method | Takuya Ohara, Takashi Ono, Shigeki Aisawa, Hiroyuki Honma, Satoru Saitoh +1 more | 2015-03-10 |
| 8971703 | Wavelength dispersion amount estimation method, wavelength dispersion compensation circuit, and reception device | Etsushi Yamazaki, Takayuki Kobayashi, Riichi Kudo, Koichi Ishihara, Tadao Nakagawa +1 more | 2015-03-03 |
| 8571037 | Optical digital transmission system | Shigeki Aisawa, Yutaka Miyamoto, Yoshiaki Kisaka, Yasuyuki Endo, Katsuyoshi Miura +1 more | 2013-10-29 |
| 8514881 | Digital transmission system and digital transmission method | Yoshiaki Kisaka, Takuya Ohara, Shigeki Aisawa, Yutaka Miyamoto, Kazuhito Takei +3 more | 2013-08-20 |
| 8254789 | Device and method for adjusting chromatic dispersion | Arnold Mattheus, Yutaka Miyamoto | 2012-08-28 |
| 8135285 | Optical transmission system and method | Yoshiaki Kisaka, Shigeki Aisawa, Yutaka Miyamoto, Yasuyuki Endoh, Kazuhito Takei | 2012-03-13 |
| 8005374 | Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system | Kazushige Yonenaga, Mikio Yoneyama, Akira Hirano, Shoichiro Kuwahara, Tomoyoshi Kataoka +2 more | 2011-08-23 |
| 7970008 | Multiplexing transmission system and multiplexing transmission method | Yoshiaki Kisaka, Shigeki Aisawa, Tetsuo Takahashi, Takuya Ohara, Masafumi Koga +1 more | 2011-06-28 |
| 7734194 | Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission system | Kazushige Yonenaga, Mikio Yoneyama, Akira Hirano, Shoichiro Kuwahara, Tomoyoshi Kataoka +2 more | 2010-06-08 |
| 7536108 | High precision chromatic dispersion measuring method and automatic dispersion compensating optical link system that uses this method | Akira Hirano, Yutaka Miyamoto, Shoichiro Kuwahara, Hiroshi Takahashi, Yasuyuki Inoue | 2009-05-19 |
| 7424230 | Digital transmission system | Akira Hirano, Yoshiaki Kisaka, Yutaka Miyamoto | 2008-09-09 |
| 7116917 | Optical transmitter and optical transmission system | Yutaka Miyamoto, Akira Hirano, Shoichiro Kuwahara | 2006-10-03 |
| 7095758 | Multiplexing and transmission apparatus | Takashi Ono, Yoshiaki Kisaka | 2006-08-22 |
| 7002968 | Transport system and transport method | Yoshiaki Kisaka, Yutaka Miyamoto, Takashi Ono, Hiromu Toba | 2006-02-21 |
| 6598092 | Trunk transmission network | Shinji Matsuoka, Yoshihiko Uematsu | 2003-07-22 |
| 6202082 | Trunk transmission network | Shinji Matsuoka, Yoshihiko Uematsu | 2001-03-13 |
| 6034974 | Channel-selection-type demultiplexing circuit | Shinji Matsuoka, Yoshihiko Uematsu | 2000-03-07 |
| 5574717 | Line terminating equipment in SDH networks, using forward error correcting codes | Yoshiaki Yamabayashi, Yukio Kobayashi, Kiyoshi Nakagawa, Ken-ichi Yagisawa | 1996-11-12 |